Properly resolve dependency part paths in summary linker.

pkg/analyzer/lib/src/summary/link.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /**
  * This library is capable of producing linked summaries from unlinked
  * ones (or prelinked ones).  It functions by building a miniature
  * element model to represent the contents of the summaries, and then
  * scanning the element model to gather linked information and adding
  * it to the summary data structures.
@@ skipping 3533 matching lines @@
    * [library], return its index.  Otherwise add a new dependency to table and
    * return its index.
    */
   int addDependency(LibraryElementForLink library) {
     for (int i = 0; i < _linkedLibrary.dependencies.length; i++) {
       if (identical(_getDependency(i), library)) {
         return i;
       }
     }
     int result = _linkedLibrary.dependencies.length;
+    Uri libraryUri = library._absoluteUri;
+    List<String> partsRelativeToDependency =
+        library.definingUnlinkedUnit.publicNamespace.parts;
+    List<String> partsRelativeToLibraryBeingLinked = partsRelativeToDependency
+        .map((partUri) =>
+            resolveRelativeUri(libraryUri, Uri.parse(partUri)).toString())
+        .toList();
     _linkedLibrary.dependencies.add(new LinkedDependencyBuilder(
-        parts: library.definingUnlinkedUnit.publicNamespace.parts,
-        uri: library._absoluteUri.toString()));
+        parts: partsRelativeToLibraryBeingLinked, uri: libraryUri.toString()));
     _dependencies.add(library);
     return result;
   }
 
   /**
    * Perform type inference and const cycle detection on this library.
    */
   void link() {
     for (CompilationUnitElementInBuildUnit unit in units) {
       unit.link();
@@ skipping 1529 matching lines @@
    * there are no type parameters in scope.
    */
   TypeParameterizedElementMixin get _typeParameterContext;
 
   @override
   noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
 
   @override
   String toString() => '$enclosingElement.$name';
 }